Popular Circuits Page 32
- Page 32
-
-
-
Hi, I would like to use this relay: PE014A12 (tyco electronics) It has only 1 coil and it has to be driven + / - to switch on and - / + to switch off, ....
-
An EL lamp is a solid state, low power, uniform area light source. Because of its thin prole (as thin as 0. 3 mm) and the fact that it can be built into almost any size and shape, EL lamps are an ideal way to provide back-lighting for LCD displays, membrane....
-
In electron technology, the triode uses a kind of extremely general components and parts, the parameter of the triode and a lot of electricity parametric measurement schemes, measuring results have a very close relation, so, in the electronic design, the....
-
All feature crystal-controlled transmitters and tunable superregenerative receivers with RF preamplifiers designed for operation on the 2, 6 or 10 meter amateur bands. The highly sensitive receivers pull in signals as low as 1 microvolt and produce complete....
-
Adjust value of R1 to get good performance of sensor LDR, if in your practice with 2. 2 M ohm still turn on the lamp you can add value of R1 with the large of 2. 2 M ohm. R1 and R2 is used as voltage divider. R2 is LDR that resistance will change when LDR in....
-
-
The charger consists of two stages: The first is a capacitive voltage doubler, which uses a 555 timer IC driving a pair of transistors connected as emitter followers, which in turn drive the voltage doubler proper. The doubler has power resistors built in,....
-
The choice of IF is usually determined from availability of filters with desired characteristics. For communication receiver or transceiver the requirements for main selective element are very high, and usually two types of filters are used:....
-
LED Blown AC Fuse Indicator Circuit Diagram This circuit monitors a AC fuse. In this circuit, the LED indicator shows whether or not the fuse is....
-
The lm1877 is an amplifier stereo developed to supply 2W / channel in loads of 8 ohms It was drawn to work with the minimum of external components. Turning him/it a circuit integrated flexible that it can be used in several applications of audio....
-
The converter has a 60-ms conversion consumes 460 pA of 1's. 5 V power supply and maintains an accuracy of 10 bits on a 15 ° C in the temperature range of 35 ° C. A pulse applied to convert the command line causes Q3, operating in reverse mode, the....
-
-
5 min circuit can continue to operate in the state of the power outage, the role to protect the refrigerator. Refrigerator power protection circuit 1136 as shown in FIG. T for ..
-
Bistable circuit at the operating frequency of 10kHz or less ..
-
-
A small 325mW amplifier with a voltage gain of 200 that can be used as a bench amplifier, signal tracer or used to amplify the output from personal radios, etc. The circuit is based on the National Semiconductor LM386 amplifier. In the diagram above, the....
-
DC capacitor tester circuit diagram composed of 555 is shown as the chart. The tester is composed of the pulse generator, one-shot, DC amplifier and meter indication circuit. It can measures the npF ~ 10?F capacitor. The range is divided into 0 ~ 100PF, 0 ~....
-
The LTC1685 is geared for half-duplex operation, whereas
the LTC1686/LTC1687 can operate in full-duplex mode. All
include a receiver fail-safe feature, whereby the receiver
output remains in a high state over the entire 12V to 7V
common mode range when....
-
Potentially, headphone listening can be technically superior since room reflections are eliminated and the intimate contact between transducer and ear mea....
-
-
The absence of compensation simplifies development and testing. The number 6 billion turns up often as the number of cell phones in use worldwide. Published estimates average....
-
The Motorola MC145158 is a dual-modulus, serial-input PLL frequency synthesizer which is commonly used in older Motorola cellular phones. Refer to the MC145158's datasheet for the nitty-gritty technical details. The MC145158 is no longer manufactured, but....
-
This includes a 220uF capacitor and two diodes to slow down the switch-on to reduce the output thump as the output capacitor charges through the speaker. This is not essential, depending on speaker sensitivity, with my own speakers there is just an....
-
A Practical Application for Cyclone V FPGA Power Requirements The integration of multiple power modules on a single power board allows for specific load requirements to be....
-
The design of the charger is similar to that of many commercially available chargers. The charger consists of a mains adaptor, two resistors and a light-emitting diode (LED). In practical use, this kind of charger is perfectly all right. Resistor R1 serves....
-
An analog to digital converter converts an analog input voltage into a digital value. This is a circuit for shows the analog to digital converter. This circuit is using microcontroller ATmega8 for control the operation. This is the figure of the circuit. The....
-
I n this circuit, the alarm will be switched on under the following four different conditions: 1. When light falls on LDR1 (at the entry to the premises). 2. When light falling on LDR2 is obstructed. 3. When door switches are opened or a wire is broken. 4.....
-
How to Make a Hydrogen Generator 555 Timer Circuit PWM. This Pulse Width Modulation (PWM) Circuit could Produce Hydrogen on Demand....
-
The AN12974A Audio Power Amplifier features built-in AGC circuitry and Spatializer environ, . , The Spatializer environ, is Desper Products, Inc. `s exclusive signal processing technology that is able to generate surround sound for low-power mobile....
-
The timer circuit shown gives independent control of the output`s on and off intervals, which can range from 0. 055 seconds to 30 minutes, relatively unaffected by power-line transients. IC1 is a CMOS programmable-timer chip that includes 24 ripple-binary....
-
The quality sound was terrible, and suddenly it stoped working. Can anyone explain me in which part of the circuit i did something wrong any sugestions to improve the sound quality and make it work the transistors used are both BC546, and the microphone was....
-
-
Simple add-on module, Switchable “Control-flat†option In order to obtain a good audio reproduction at different listening levels, a different tone-contro....
-
This device is designed to be a simple, inexpensive comparator`, intended for use in a solar cell power supply setup where a quick too low` or just right` voltage indicator is needed. The circuit consists only of one 5V regulator, two transistors, two LEDs,....
-
Active loudspeakers have a lot of advantages concerning simple loudspeakers that use passive components for the elements concretisation of segregation of frequencies. In the case of active loudspeakers we have, proportionally, bigger build cost, because each....
-
With the advent of modern radio and radar systems came the need to provide stable harmonic oscillations at particular carrier frequencies to establish the required modulation and mixing conditions. While the carrier frequencies in the early days mostly....
-
-
The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector. The piezo element must be placed vertically, one end solidly to ground. A 2-3 pound weight of fine gravel in a loose package should be placed on top at....
-
The input impedance is the value of potentiometer Rl. If your instrument has extra-deep bass, change capacitor Cl to 0.5 mF. What appears to be an extra part in the feedback loop is a brightening tone control. The basic feedback from the op amp's output (pin....
-
Core elements of this circuit is the second four-input NOR gate terminal IC CD4001, the entire circuit is simple structure, less components, easy to make, especially for remote..
-
-
We are surrounded by battery operated equipment of all kinds, and this array is growing still. Manufacturers and designers lean over backwards to make sure that their equipment draws a small current and can thus be operated by a battery. This has its flip....
-
-
The 100W audio power amplifier is powered by the integrated circuit LM12CLK which is operational power amplifier..
-
Your child`s battery toy has failed and you have to fix it. Once you have managed to get it apart, the battery compartment is not likely to be connected to the works or the batteries might have gone flat anyway. The solution is this switchable supply which....
-
Long used to improve efficiency, reduce ripple, and shrink capacitor and inductor size in buck converters, the multiphase approach can provide the same benefits for boost converters....
-
This is the Sequencer circuit. Power to the Logic portion of the circuit is provided by a standard commercial "wall-wart" power adaptor supplying 6 VDC. The 555 timer IC provides the pulse train that drives the chase; the timing is adjustable with the 100K....
-
FIG. 555 and R1, C1 and other components monostable delay circuit, the input square wave signal or square wave signal by a Schmitt trigger shaping after the trigger requirement..
-
In this auto shut off tone generator project, once the switch to the 9V power supply is connected, the alarm will trigger at a frequency of approximately 1.27 kHz. It will remain ON for a duration of approximately 170 seconds or 2.8 minutes before it....
-
Circuit as shown by the 555 oscillator and amplifier driver stage composition. 555 and R1, R2, RP1, C1 and other components of a multi-harmonic oscillator whose frequency can b..
-
This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. The device formed by Q1, Q2 and related resistors triggers the SCR. Timing is provided by R1, R2 & C1. To change flashing frequency do....
-
This instrument is a one or two channel frequency synthesizer. DC to 35 MHz frequency with 0.1 Hz resolution. +16 to -48 dBm signal level with 0.1 dB resolution. adjustable phase between the 2 channels with 11.25 degree resolution. pushbutton and knob....
-
Function generators often play a critical role in the design, testing, and operation of encoders, modulators, demodulators, and measurement instruments. Here`s an inexpensive way to build a bus-controlled sinewave oscillator that has downright low....
-
A term used when referring to a robotic control concept, developed by Rodney Brooks, which is strongly associated with Behavior-based robotics, a branch of robotics research that incorporates modular Behavior Based AI Whereas traditional Artificial....
-
The circuit requires a double pole, double throw relay in conjunction with a single transistor to allow toggling the relay with a momentary push button. One set of relay contacts is used to control the load, while the other is used to provide feedback to....
-
A 2001 cavelier. the other day one of my low beam headlights quit, i replaced the balb it still doesnt work. when i pull it into gear the daytime driving lights flash a bunch of times then go off and the service light is on. i have check the wires under the....
-
The Flash-based program memory is where the program sketch is stored after an upload. The SRAM act as the main memory where program variables are temporarily stored as the sketch executes. The system clock synchronizes the internal operation of the CPU and....
-
This circuit gives an output (which in this case is OV) when an input voltage lies in between two specified voltages. When it is outside this window, the output is positive. The two op amps are used as voltage comparators. When Vin is more positive than Vref....
-
-
The following circuit shows about How To Build The Variable DC Power Supply Circuit. This circuit based on the 7805 IC. Features: other output is ....
-
A very precise digital thermometer with LM35 probe (0, 1 degree of freedom). The circuit has two adjustments. One of them, R5, adjusts the displays to 0. To perform this, we have to connect the extreme part of R4 (that goes to the temperature probe) to the....
-
Using electronic scheme below can be designed a zener diode tester using few electronic parts. Using this zener tester and a multimeter can be measured and determined with a high precision threshold voltage of a zener diode. Zener voltage can be read with a....
-
The circuit shown in this schematic diagram is a square-wave oscillator circuit. The main component of this oscillator circuit is LP165/365 comparator. As....
-
Building a serial voltage meter to measure from 0 to 5 volts DC is actually pretty easy. Using MeLabs PicBasic, and Microsoft`s Visual Basic Version 5 Pro. You need Visual Basic Pro version because you will have to use Basic`s MSComm control. This control is....
-
A line follower robot, or a LFR in short, is a simple autonomous robot that optically tracks a line made on the surface of the floor. That means you have an arbitrary line drawn on the floor and the robot tracks it by moving right along it! The line is....
-
This circuit is a variable audio bandpass filter that has a low cutoff variable from about 25 Hz to 700 Hz and a high cutoff variable from 2. 5 kHz to over 20 kHz. Rolloff is 12 dB/octave on both high and low ends. R2-a-b and RG-a-b are ganged potentiometers....
-
The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range,....
-
The circuit has been designed to accommodate all those who dedicate many hours of their lives by exploring the endless pages of this site. Despite the fact that it consists of only three components (Most were not little!), Is able to provide an indication of....
-
The circuit in the schematic below is an infrared transmitter. The infrared beam is transmitted in a nearly line-of-sight pattern to another device with an infrared receiver. The plotted waveforms are the output voltages of the two intermediate stages....
-
The circuit shown here is used to switch on a lamp when the tele- phone rings, if the ambient light is insufficient. The circuit uses only two ICs and it can be implemented very easily. A light dependent resistance (LDR), with about 5 kilo-ohms resistance in....
-
The Measured Value and The Setpoint are two inputs to a Control System. The Measured Value is the Amplified input of a Transducer or Sensor for some Parameter that needs to be controlled. It could be Pressure or Temperature. etc. The Setpoint is the User....
-
A substation capable of consuming 100MVA with375KVA, 60Hz in input and 132KV and 50hz using same power. so my problem is how to change the 60hz to 50hz, including wiring diagram..
-
-
2SA130 transistor shown oscillator, the oscillation frequency of 7 MHz, the power supply voltage is 6V, frequency-selective resonant circuit load 600 Q. ..
-
Our CONTINUITY TESTER gives an audible indication of continuity between the probes so you can keep your eyes on the probe tip. Secondly its response-time is very short so that you can make lots of tests very quickly while listening for the beep.
And....
-
Powering this circuit with a 6v alkaline battery, the circuit works just fine with 100uf capacitors. But the problem is I want to replace the LED with a dpdt relay, I tried a 6v one I had laying around but it wont budge. Also when I tried the circuit with a....
-
-
-
The hardest part for this circuit was the title. It is quite easy to miss the sound of a doorbell if you are watching TV, this circuit gets round the problem by providing a visual indication, i. e. a lamp. As an alternative, a LED could also be used. You....
-
-
Nicd battery charger schematic and description. This Nicd battery charger circuit can charge 12V, 6V, & 9V battery packs. ....
-
This is the working prototype. The eagle files have some minor changes made to it. Fixed some mistakes and re-positioned a few parts. This one is for the phreakers of the past. A simple Arduino shield to decode DTMF tones using an audio input. It can easily....
-
The encoder strip should be laser-printed on sticky label material (ink-jet might work, I haven`t tried it). It is then cut out and wrapped around the barrel of the second drive gear. I used bright white sticky address labels Avery "WeatherProof White....
-
Logic power control of analog regulator can be useful in application where a digital circuit/controller need to control power source, such as in EEPROM programmer or other power controls. This is a circuit provide ON-OFF control for 78xx regulator using....
-
I hate to suggest the specific application `bicycle` because it may be use to protect many items from theft. This anti-theft alarm project is built around....
-
The following is a layout of my repeater system and what was needed to get it on the air. The ILink system was designed by Graeme, M0CSH, and I take no credit for its success. The circuit below is only required by repeater control stations (sysops) and not....
-
This is a simple SCR based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It`s designed to be used with the usual types of normally-closed input devices such as - magnetic-reed....
-
It is quite easy to get a watt or more with very simple equipment, but to get more than 5 watts becomes a little more difficult. This article describes a 10 watt linear amplifier that is capable of delivering over 15 watts into 50 ohms and uses cheap plastic....
-
The 555 Stepper Pulse Generator kit will help you with the pulse required to drive your favorite DC Servo Motor application. This kit uses the famous 555 timer IC for generating the Stepping Pulse...
-
-
10W Audio Amplifier with Bass-boost. High Quality, very simple design. No preamplifier required. Circuit diagram: Parts: P1 22K Log.Potentiometer (Dual-gang for...
-
SINCLAIR is a one channel PHONE DIALER, able to send, on the commuted phone line, the alarm messages previously recorded to the NOT volatile DAST memory, to the set numbers, previously saved on the NOT volatile EEPROM memory..
-
Generally, during power up of the apparatus, the capacitor is the main reason that surge current emerges, the synoptic diagram of the principle is shown in Fig. 1. Have it in the picture after K1 closes, the intersection of capacitor and C begin, charge,....
-
Edwin Henry Colpitts was a communications pioneer best known for his invention of the Colpitts oscillator. As research branch chief for Western Electric in the early 1900s, he and scientists under his direction achieved significant advances in the....
-
The reflected IR signal detected by the photo diode is fed to a signal conditioning circuit that filters the unwanted signals and boost the desired pu....
-
As shown, the circuit 555 as the core, and the composition of the photosensitive resistor RG and RP1 like. RG strength with light exhibit different resistance, reset and set th..
-
This is a very useful project for anyone working in electronics. It is a versatile power supply that will solve most of the supply problems arising in the everyday work of any electronics work shop. It covers a wide range of voltages being continuously....
-
Using a thermistor in the position shown makes a heat activated sensor. A change in temperature will alter the output of the opamp and energize the relay and light the LED. Swapping the position of the< thermistor and 47k resistor makes a cold or frost alarm...
-
AD524 differential shielded drive as shown in Fig. AD524 The RC:, RCz not only gain setting foot, also output feedback (internal 20kfl resistance) circuit part of this operatio..
-
Pins 1 and 5 on this amplifier are trim pins and are not used in the circuit. When not used it is required to leave them floating...
-
Microcontrollers & Microprocessors - The 8051 projects Page! Find out all our information on 8051 projects here. Everything you wanted to know about 8051 projects but were afraid to ask!....